Lifting valve



Feb. 1, 1927. 1,516,420`

w. G. wlLspN LIFT'ING VALVE Filed Jan. 6, 1926 VvE/V701? I Patented `1:' eb. l, 1927.

wYLIE GEMMEL WIIJsoN, oELELIzABE'rH, .NEW JERSEY.

Lrrrruef VALVE.

Application led January 6', 1926. Serial No. 79,570.

This invention relates to improvements in valves. Its object is to produce a nonsticking valve having a fluid-tight, port joint in which one of the complementary sealing or joint formin surfaces is a tapered cylindrical port wal of hard, dense and but slightly elastic material and in which the other sealing surface is the wall of .a tapered cylindrical port.

In the drawing forming a part hereof and illustrating the invention, the ii ure is a vertical central section of a so-call valve embod in the invention. i

In tile rawings, the under casing member 1 has a diaphragm 2 between the intake and discharge chambers of the valve casing. The diaphragm is annularly recessed on its upper face; its bottom is formed with a port 2a of lesser diameter than the diameter of the provided with the usual interior means forcarrying a threaded valve stem 11 which at 10a is in threaded engagement witha threaded hole through the bonnet top and has a handle 11'* for use in reciprocating the spindle to seat and unseat the reci rocable sealing member or lug. The un er end of the stem is rovide with a flanged enlargement 12 whic is held in an inverted, cupped nut 13 through the upper wall of which the stem passes freely, the nut being threaded into theupstanding annular threaded fiange 14 of a metallic, tapered cylindrical sealing plug 15. e

The sealin member S complementary to the reciproca le sealing surface 15a of the metal plug 15 is made up of successive, {latwise superposed, stronglyY compacted Vand united layers of asbestosor the like forming a sealing member S of stift' and but slightly elastic character. vIt is preferably made up of asbestos packing rings or the like. It is of annular orm and has between its under and up r ends an upwardly tapered sealing sur ace S corresponding to the sealing surface 15 of the tapered plug. Sealing -member S is mounted vsnugly in the recess The upper, peripheral corner of' the plug 15 is bevelled ofi' to prevent it from seating on the upper, interior, circumferential, bev- .elled corner 18 of the complementary. sealing member S, the under, interior peripheral v.corner 19 of which is also bevelled. The sealing surface S projects beyond the bevelled,

surfaces at 18 and 19.

In the present case, the under end of the sealing member S is solidly supported on the rigid ledge 2b and it is clamped down into the recess 2 by the threaded annulus 16 so that the upper end of the sealing member S is rigidly supported by the upper Wall of the threaded annulus. The laminae X of the sealing member S are in a dense, precompacted, united condition. While this sealing member is compressible, it is only very slightly compressible; and as a conseluence it substantially retains its form'uner pressure. Being hard and dense, it dces not yield in such wise that it can be substantially deformed. When the plug 15 is either seated or moved away from .its seat, the edges of the disks, layers, or laminae in the member S are subject to frici ion to'a greater or less extent and this friction, especially in a seating movement, involves the wiping of the ed es of the laminae in the 'scalino' surface 1 with a tendency to tear or dlsrupt them and consequently these edges require the rigid support afforded them by the ledge 2" and the under endwall of the annulus 16, because the material -is too weak of itself to stand the pull and pressure on the edges and it is necessary that they do not project unduly beyond their supports. vThat is, in-

wardly beyond the opposed walls of the ledge 2b and annulus 16. The extreme under and upper end portions of the sealing member S where they are bevelled, do not function for sealin ,but do function to support each the other 1n a bevelled portion and also t9 support the intermediate laminae the edges of`which constitute the sealing surface. The bevelled laminae at the ends of the member S also serve to space the sealing surface forming laminae awa from the rigid ledge 2" and under wall o annulus 16 and these walls also give rivid support to all the laminae in the member. The walls and the lll.

lamin thus su port each other and insure untorn and uniia ed sealing edges of the lamina: kforming t e member S.' And it is an object'of this invention so to support the edges of the lamin which constitute the sealing edges that thqy will'not be frayed or torn under conditions of use. If raying or tearing is started in the edge of a lamina in the sealing-surface, it is apt to be extended toV one or more other layers in the sealing surface and eii'ect leakage.

What I claim is:

1. In a valve the combination with a-reciprocable, solid valve plug of a stationary, apertured, sealing member of compacted and united laminae of dense and but slightly elastic material, the aperture having a conical, downwardly tapered sealing surface composed ofthe edges of layers of laminae l and-having at each end of its sealing surface an interior bevelled, peripheral corner portion the laminae in which serve as supports for "each other and for all the laminae between rigid flat walls; and means for supporting and clamping said member in place, such means comprising rigid end walls and the interiorly bevelled laminae at each end of the apertured sealing `member' serving to space thesealing surface apart from an adjacent rigid wall. u

2. In a valve. the combination with a' reciprocable, solid 'valve plug of a stationary,

apertured, sealing member of cmpacted and united laminae of dense and but slightly elastic material, the aperture 'having a conical, downwardly tapered sealing surface composed of the edges of layers of laminas and having at each end of its sealing surface an interior bevelled, eripheral corner portion the lamin in which serve as suptamano' ports for each other and for all the laminas between rigid flat walls; and means for supporting and clamping said member in place, such meanscomprisin rigid'end walls and the interiorly bevelle' lamin at each end of the apertured sealin member serving to space the sealing sur acev apart from an adjacent ri id wall; and means for supporting an clamping said sealing member in place.

3. In a valve, .the combination with a` reciprocable,solid va ve plug of a stationary,

apertured, sealing m mber of compacted and.v

space the sealing surface apart from an adjacent rigid wall; said conical, downwardly tapered sealing surface rejecting inwardly of the interior, outwardly bevelled peripheral corners; andI means for supporting and clamping said sealing member 1n lace, said sealing Surface projecting towar s the axis of the sealing member, beyond the supporting and clamping means.

Signed at New York in the county of New York and State of New York this 23th day of December, A. D. 1925.

` WYLIE GEMMEL WILSON.V 

